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New Message on BDOTNET
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From: MohangandhiC
Message 3 in Discussion
Hi, The first point is, as we are forcing to inherit class by saying
"Abstract" in same way we can force the developer not to inherit a class by
specifying "Sealed". We can just use it for creating instances. The next
important point comes in design patterns. Look at the following explanation:
Singleton Pattern:
Intent: Ensure a class only has one instance, and provide a global point of
access to it [GoF]. In earlier days we need to implement in the following
way: // Declaration
class Singleton {
public:
static Singleton* Instance();
protected:
Singleton();
private:
static Singleton* _instance;
} // Implementation
Singleton* Singleton::_instance =
0; Singleton* Singleton::Instance() {
if (_instance == 0) {
_instance = new Singleton;
}
return _instance;
} Now by using sealed we have advantage of using in the following way:
// .NET Singleton
sealed class Singleton
{
private Singleton() {}
public static readonly Singleton Instance = new Singleton();
}
Its very simple to implement by using sealed class. Get more clarity in the
following article: http://msdn2.microsoft.com/en-us/library/ms954629.aspx
Thanks, MohanGandhi. C
PlumArc <[EMAIL PROTECTED]> wrote: New Message on BDOTNET
Use of Sealed Class
Reply
Reply to Sender Recommend Message 2 in Discussion
From: PlumArc
Hi Ramesh,
Its like a FINAL Class in Java . In other words . As you told it cant be
inherited , and the same rule u want to apply for a class , u can use
SEALED Classes.
Thanks and Regards
S.Rajinigandh
Société Générale Global Solution Centre Pvt. Ltd.
Corporate and Investment Banking
http://www.socgensolutions.com
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Use of Sealed Class
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New Message on BDOTNET
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From: Ramezh1
Message 1 in Discussion
Hi, Sealed class can not be inherited from other classes.
Then what is
use of sealed class in .Net? Thanks, Ramesh.
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